package myeclipse;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class MyEclipseGen {
	private static final String LL = "Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.";   
	 
	public String getSerial(String userId, String licenseNum) {   
	 java.util.Calendar cal = java.util.Calendar.getInstance();   
	 cal.add(1, 3);   
	 cal.add(6, -1);   
	 java.text.NumberFormat nf = new java.text.DecimalFormat("000");   
	  licenseNum = nf.format(Integer.valueOf(licenseNum));   
	 String verTime = new StringBuilder("-").append(   
	    new java.text.SimpleDateFormat("yyMMdd").format(cal.getTime()))   
	   .append("0").toString();   
	  String type = "YE3MP-";   
	 String need = new StringBuilder(userId.substring(0, 1)).append(type)   
	    .append("300").append(licenseNum).append(verTime).toString();   
	  String dx = new StringBuilder(need).append(LL).append(userId)   
	    .toString();   
	  int suf = this.decode(dx);   
	  String code = new StringBuilder(need).append(String.valueOf(suf))   
	    .toString();   
	 return this.change(code);   
	}   
	 
	private int decode(String s) {   
	  int i;   
	 char[] ac;   
	  int j;   
	  int k;   
	  i = 0;   
	 ac = s.toCharArray();   
	  j = 0;   
	  k = ac.length;   
	  while (j < k) {   
	    i = (31 * i) + ac[j];   
	    j++;   
	  }   
	  return Math.abs(i);   
	}   
	 
	private String change(String s) {   
	  byte[] abyte0;   
	  char[] ac;   
	  int i;   
	  int k;   
	  int j;   
	  abyte0 = s.getBytes();   
	  ac = new char[s.length()];   
	  i = 0;   
	  k = abyte0.length;   
	  while (i < k) {   
	   j = abyte0[i];   
	   if ((j >= 48) && (j <= 57)) {   
	   j = (((j - 48) + 5) % 10) + 48;   
	    } else if ((j >= 65) && (j <= 90)) {   
	    j = (((j - 65) + 13) % 26) + 65;   
	    } else if ((j >= 97) && (j <= 122)) {   
	    j = (((j - 97) + 13) % 26) + 97;   
	    }   
	    ac[i] = (char) j;   
	    i++;   
	  }   
	 return String.valueOf(ac);   
	}
	 
	public MyEclipseGen() {   
	 super();   
	}   
	 
	public static void main(String[] args) {   
	 try {   
	    System.out.println("please input register name:");   
	   BufferedReader reader = new BufferedReader(new InputStreamReader(   
	      System.in));   
	    String userId = null;   
	    userId = reader.readLine();   
	    MyEclipseGen myeclipsegen = new MyEclipseGen();   
	    String res = myeclipsegen.getSerial(userId, "5");   
	    System.out.println("Serial:" + res);   
	    reader.readLine();   
	  } catch (IOException ex) {   
	  }   
	}   
}
